Timing, and engine temps
Thread Starter
Race Director
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From: Camp Verde AZ
C1 of Year Finalist (performance mods) 2019
2017 C1 of Year Finalist
Timing, and engine temps
I see posts where the normal operating temp of the car is in the 200-220 range,and i see other posts where someone states teh computer starts pulling timing at 194F.
Which is it?
It would seem normal timing would be in effect at "normal" operating temps, not having timing being pulled below the normal ops temp.
or has someone custom programmed their ECU for temps and timing?
Doug
Which is it?
It would seem normal timing would be in effect at "normal" operating temps, not having timing being pulled below the normal ops temp.
or has someone custom programmed their ECU for temps and timing?
Doug
Instructor
Joined: Oct 2002
Posts: 219
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From: MI
This is correct, just checked the ECT cal myself.
-1 @ 194
-3 @ 212
-5 @ 230
-6 @ 248
Guess I'll be putting a 170 or 180 thermostat in mine.
IAT starts pulling at 132 and as much as -10 at 198.
I will say that I've never seen my IAT over 140 though.
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Drifting
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From: Tucson Arizona
St. Jude Donor '08
194*. But remember it only pulls 3* of timing until 230* ECT and then 5* of timing are pulled and up from there. And of course remember these engines are not tuned for maximum performance under all conditions - there are durability, emissions and other considerations.
Last edited by jim2092; Jul 9, 2015 at 09:23 AM.
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The other thing to keep in mind is the LT engines don't need much timing to begin with. The adder tables are overly aggressive (set high) and timing subtracted down closer to the norm when the extra timing cant be used due to heat and load.
Point is most would be surprised where the total timing on these engines run. Its no where near where our past experiences tells us it should be.
Last edited by dar02081961; Jul 9, 2015 at 11:45 AM.